EventViewCreatorAlgorithm.h

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/*
  General-purpose view creation algorithm <bwynne@cern.ch>
 
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ViewAlgs_EventViewCreatorAlgorithm_h
#define ViewAlgs_EventViewCreatorAlgorithm_h
 
#include <vector>
#include <string>
 
#include "AthenaBaseComps/AthAlgorithm.h"
#include "AthContainers/ConstDataVector.h"
#include "TrigCompositeUtils/TrigCompositeUtils.h"
#include "DecisionHandling/InputMakerBase.h"
 
#include "TrigSteeringEvent/TrigRoiDescriptorCollection.h"
 
#include "GaudiKernel/IAlgResourcePool.h"
#include "GaudiKernel/IScheduler.h"
#include "AthViews/View.h"
 
#include "DecisionHandling/IViewCreatorROITool.h"
 
// Muon specifics
#include "xAODMuon/MuonContainer.h"
#include "xAODMuon/MuonAuxContainer.h"
#include "MuonCombinedEvent/MuonCandidateCollection.h"
 
// Jet specifics
#include "xAODJet/JetContainer.h"
#include "xAODJet/JetAuxContainer.h"
 
class EventViewCreatorAlgorithm : public ::InputMakerBase
{
 public:
    EventViewCreatorAlgorithm( const std::string& name, ISvcLocator* pSvcLocator );
    virtual ~EventViewCreatorAlgorithm();
    virtual StatusCode initialize() override;
    virtual StatusCode execute(const EventContext&) const override;
    virtual StatusCode finalize() override { return StatusCode::SUCCESS; }
 protected:
 
    EventViewCreatorAlgorithm();
 
    SG::WriteHandleKey< ViewContainer > m_viewsKey{ this, "Views", "Unspecified",
      "The key of views collection produced" };
 
    SG::WriteHandleKey< ConstDataVector<TrigRoiDescriptorCollection> > m_inViewRoIs{ this, "InViewRoIs", "Unspecified",
      "Name of the collection which should be inserted into the just-spawned views to seed them with their ROI" };
 
    // needs for views
    Gaudi::Property< std::string > m_schedulerName { this, "SchedulerName", "AvalancheSchedulerSvc", "Name of the scheduler" };
    Gaudi::Property< std::string > m_viewNodeName{ this, "ViewNodeName", "", "Name of the ControlFlow node to attach new views to" };
 
    Gaudi::Property< bool > m_viewFallThrough { this, "ViewFallThrough", false,
      "Set whether views may access StoreGate directly to retrieve data" };
    Gaudi::Property< std::vector< std::string > > m_viewFallFilter { this, "FallThroughFilter", {}, 
      "An optional list of SG keys (or parts of them) that can come from StoreGate via FallThrough" };
 
    Gaudi::Property< bool > m_requireParentView { this, "RequireParentView", false,
      "For each new view, locate and link any parent views (previous step). Fail if no parent view can not be found." };
 
    Gaudi::Property< bool > m_reverseViews { this, "ReverseViewsDebug", false, 
      "Reverse order of views, as a debugging option" };
 
    SG::ReadHandleKey<TrigCompositeUtils::DecisionContainer> m_cachedViewsKey { this, "InputCachedViews", "",
      "Optional ReadHandle on the output (InputMakerOutputDecisions) of an EVCA in a previous Step, whose Views can be re-used. Not currently used." };
 
    ToolHandle<IViewCreatorROITool> m_roiTool{this, "RoITool", "",
      "Tool used to supply per-Decision Object the RoI on which the Decision Object's view is to be spawned"};
 
    Gaudi::Property< bool > m_placeMuonInView { this, "PlaceMuonInView", false, 
      "Muon slice specific option. Place Muon and MuonCandidate inside newly spawned View instance. See also InViewMuons, InViewMuonCandidates" };
 
    // TODO - phase this out by reading the muon from the parent View. Remove any ambiguity.
    SG::WriteHandleKey< xAOD::MuonContainer > m_inViewMuons {this,"InViewMuons","",
      "Name with which the Muon should be inserted into the views"};
 
    SG::WriteHandleKey< ConstDataVector<MuonCandidateCollection> > m_inViewMuonCandidates {this,"InViewMuonCandidates","",
      "Name with which the Muon Candidate should be inserted into the views"};
 
    StatusCode placeMuonInView( const xAOD::Muon* theObject, SG::View* view, const EventContext& context ) const;
 
    Gaudi::Property< bool > m_placeJetInView { this, "PlaceJetInView", false, 
      "Jet slice specific option. Place Jet inside newly spawned View instance. See also InViewJets" };
 
    //switch off the use of cached EventViews
     Gaudi::Property< bool > m_cacheDisabled { this, "CacheDisabled", false,
      "Set whether cached EventViews are to be accessed" };
 
    // TODO. In the next iteration, start to use this. Remove "_PROPERTY" which is there to catch against algs with identical properties
    SG::WriteHandleKey< xAOD::JetContainer > m_inViewJets {this,"InViewJets","", 
      "Name with which the Jet should be inserted into the views"};
 
    StatusCode placeJetInView( const xAOD::Jet* theObject, SG::View* view, const EventContext& context ) const;
 
    StatusCode linkViewToParent( const TrigCompositeUtils::Decision* outputDecision, SG::View* newView ) const;
 
    StatusCode placeRoIInView( const ElementLink<TrigRoiDescriptorCollection>& roi, SG::View* view, const EventContext& context ) const;
 
    SmartIF<IScheduler> getScheduler() const;
 
    bool checkCache(const TrigCompositeUtils::DecisionContainer* cachedViews, 
      const TrigCompositeUtils::Decision* outputDecision, 
      size_t& cachedIndex,
      MatchingCache& matchingCache) const;
 
    StatusCode populateMatchingCacheWithCachedViews(const TrigCompositeUtils::DecisionContainer* cachedViews, MatchingCache& matchingCache) const;
 
  private:
 
    std::vector<TrigCompositeUtils::LinkInfo<ViewContainer>> viewsToLink(const TrigCompositeUtils::Decision* outputDecision) const; 
 
};
 
#include "EventViewCreatorAlgorithm.icc"
 
#endif